Improvement in rotary gang-plows



2 Sheets-Sheet 1.

J. K. UNDERWO-OD. ROTARY GANG PLOW No.169 ,499.

Patented. Nov.2,187 5 WITNESSES: a;

ATTORNEYS.

n. PETERS. PHOTO UTHOGRAPN UNITED STATES PATENLQFELQE- JOHN K.UNnERwoon'oF SAUK CENTRE, MINNESOTA.

IMPROVEMENT IN ROTARY GANG-PLOWS.

Specification forming part of Letters Patent No. 169,499, dated November2, 1875; application filed July 31, 1875.

To all whom it may concern:

Be it known that I, JOHN K. UNDERWOOD, of Sank Centre, in the county ofStearns and State of Minnesota, have invented a new and Improved RotaryGang-Plow, of which the following is a specification:

The invention will first be described in connection with drawing, andthen pointed out in the claims.

Figure 1 is aside elevation of my improved plow. Fig. 2 is a plan view.Fig. 3 is a side elevation with the cultivator attachment applied, andFig. 4 is a plan of Fig. 3.

Similar letters of reference indicate corresponding parts.

A is a kind of diamond-shaped frame,

mounted on the truck-wheels B by the frame 0 and axles D, and having thetongue E attached at one end and the caster-wheel F at the other end ofits largest diameter, and over the caster-wheel is the seat G. Hrepresents the dish shaped rotary plows, which are mounted on the beamsI, with the front edges inclined. to the land-side, as shown, to pressinto the ground and turn over the furrows as they rise up at the rearand throw them off. The beams are pivoted to the frame at J, and at thefront end they swing up and down in the keepers K, to be held in placeand to vary their height for regulating the depth of furrows. They areadjusted and held in the required position by the forked lever L,standard M, and pin N, which are so arranged relatively to the seat thatthe driver can make any needed adjustment while sitting in his seat, andthe lever is pivoted to the keepers at its front ends. By these means,also, the plows are lifted up and supported above the ground when beingmoved to or from the field to be plowed. O and P represent thecultivator-plows, of similar construction, but

of smaller size, to be used instead of the large ones for cultivating,the large ones and the caster being removed, and the wheels B beingshifted back along the machine onto the axles Q, which connectdetachably with the frame A at the corners R. The front cultivatorwheelsare mounted on the short cranked axle S, and the others on the long hindcranked axle T, to run in different lines. These axles are detachablyconnected to the frame A by the hook-headed bolts U. and. the crankedaxles; and connected to the lever V by an arm, W, and connecting-rod X,so as to be fastened high or low on the standard M, in the same mannerthat the plows H are, the lever being pivoted at the front to one of thekeepers. Y represents scrapers for cleaning the plows as they revolve.

Plows of this description will turn wider furrows with a given forcethan thoseof other forms, and the width may be raised by inclining thecaster-wheel right or left, for which it v is contrived, and has afastening device to hold it in any required position.

Having thus described my invention, I claim as new and desire to secureby Letters Patcut-- 1. The frameA 0, having two sets of axles, D R,hook-bolts U, standard M, and keepers K, adapted to receive rotary plowsor cultivators, in the manner described.

2. The combination, with rotary plows H, of beams I, pivoted upon theframe at J, and swinging in keepers K, the forked lever L, the bars 0,standard M,,and pin N, as and for the purpose specified.

JOHN K. UN DERWOOD.

Witnesses:

IRA M. CARPENTER, A. G. MATTISON.

